Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:7:27: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(; poz<=n; poz+=poz&(poz-1)^poz) ^ user.cpp: In function ‘void decrease(int, int)’: user.cpp:14:27: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(; poz<=n; poz+=poz&(poz-1)^poz) ^ user.cpp: In function ‘int query(int)’: user.cpp:22:24: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(; day; day-=day&(day-1)^day) ^ user.cpp: In function ‘int difquery(int, int)’: user.cpp:27:8: warning: variable ‘v’ set but not used [-Wunused-but-set-variable] { int v; ^ user.cpp:29:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:32:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("datorii.in","r",stdin); ^ user.cpp:33:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("datorii.out","w",stdout); ^ user.cpp:35:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:38:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&sum); ^ user.cpp:43:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&operation); ^ user.cpp:47:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&day1,&sum); ^ user.cpp:51:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&day1,&day2); ^